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Clarke" Subject: [PATCH 2/3] sysvipc: Implement semop based on semtimedop Date: Fri, 11 Oct 2019 16:15:53 -0300 Message-Id: <20191011191554.10870-2-adhemerval.zanella@linaro.org> In-Reply-To: <20191011191554.10870-1-adhemerval.zanella@linaro.org> References: <20191011191554.10870-1-adhemerval.zanella@linaro.org> Besides semop being a subset of semtimedop, new 32-bit architectures on Linux are not expected to provide the syscall (only the 64-bit time semtimedop). Also, Linux 5.1 only wired-up semtimedop for the 64-bit architectures that missed it (powerpc, s390, and sparc). This simplifies the code to support it. Checked on x86_64-linux-gnu and i686-linux-gnu. * include/sys/sem.h: New file. * sysdeps/unix/sysv/linux/semop.c (semop): Call internal semtimedop. * sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Add internal alias. * sysvipc/semtimedop.c (semtimedop): Likewise. --- include/sys/sem.h | 11 ++++++++++- sysdeps/unix/sysv/linux/semop.c | 6 +----- sysdeps/unix/sysv/linux/semtimedop.c | 6 ++++-- sysvipc/semtimedop.c | 6 ++++-- 4 files changed, 19 insertions(+), 10 deletions(-) -- 2.17.1 diff --git a/include/sys/sem.h b/include/sys/sem.h index b0fb201bd0..bab548c3f7 100644 --- a/include/sys/sem.h +++ b/include/sys/sem.h @@ -1 +1,10 @@ -#include +#ifndef _SYS_SEM_H +# include + +# ifndef _ISOMAC + +__typeof__ (semtimedop) __semtimedop attribute_hidden; +libc_hidden_proto (__semtimedop) + +# endif +#endif diff --git a/sysdeps/unix/sysv/linux/semop.c b/sysdeps/unix/sysv/linux/semop.c index 687fdcb805..e111b9aa3d 100644 --- a/sysdeps/unix/sysv/linux/semop.c +++ b/sysdeps/unix/sysv/linux/semop.c @@ -26,9 +26,5 @@ int semop (int semid, struct sembuf *sops, size_t nsops) { -#ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS - return INLINE_SYSCALL_CALL (semop, semid, sops, nsops); -#else - return INLINE_SYSCALL_CALL (ipc, IPCOP_semop, semid, nsops, 0, sops); -#endif + return __semtimedop (semid, sops, nsops, NULL); } diff --git a/sysdeps/unix/sysv/linux/semtimedop.c b/sysdeps/unix/sysv/linux/semtimedop.c index f34a7fb920..5f1b205c2b 100644 --- a/sysdeps/unix/sysv/linux/semtimedop.c +++ b/sysdeps/unix/sysv/linux/semtimedop.c @@ -24,8 +24,8 @@ /* Perform user-defined atomical operation of array of semaphores. */ int -semtimedop (int semid, struct sembuf *sops, size_t nsops, - const struct timespec *timeout) +__semtimedop (int semid, struct sembuf *sops, size_t nsops, + const struct timespec *timeout) { #ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS return INLINE_SYSCALL_CALL (semtimedop, semid, sops, nsops, timeout); @@ -34,3 +34,5 @@ semtimedop (int semid, struct sembuf *sops, size_t nsops, SEMTIMEDOP_IPC_ARGS (nsops, sops, timeout)); #endif } +weak_alias (__semtimedop, semtimedop) +libc_hidden_def (__semtimedop) diff --git a/sysvipc/semtimedop.c b/sysvipc/semtimedop.c index 5ca4d47ee3..68707d6ade 100644 --- a/sysvipc/semtimedop.c +++ b/sysvipc/semtimedop.c @@ -22,11 +22,13 @@ /* Perform user-defined atomical operation of array of semaphores. */ int -semtimedop (int semid, struct sembuf *sops, size_t nsops, - const struct timespec *timeout) +__semtimedop (int semid, struct sembuf *sops, size_t nsops, + const struct timespec *timeout) { __set_errno (ENOSYS); return -1; } +weak_alias (__semtimedop, semtimedop) +libc_hidden_def (__semtimedop) stub_warning (semtimedop)